https://www.cnet.com/news/samsung-dex-pad-galaxy-s9-render/

Unofficial renders of the DeX Pad appeared online, tweeted by frequent tipster Evan Blass. The image shows a flat pad that can hold a device, a likely follow-up to last year's Samsung DeX Dock, which connected the Galaxy S8 and Note 8 to a monitor for a desktop-like experience.

The Samsung DeX Pad should work very similarly to the DeX Dock, according to VentureBeat, except that while the DeX Pad is said to lie flat, the dock stood upright. A flat arrangement allows for the docked phone to be used as a touchpad or virtual keyboard. It isn't clear if the dock would have an Ethernet cable; the pad could connect through Wi-Fi or your phone's cellular connection.